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The two fixed points used to define an ellipse are called the:
AFolds
BForms
CFronts
DFoci
Answer & Solution
Correct answer: D. Foci
1. Each one alone is called a focus.
2. Distances to both are added.
3. They are the foci.
_Source: NCERT Class 11 Mathematics, Ch 10 'Conic Sections'_
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